core_surface.echo

; Core surface smoke (see echo26/run/core/001_surface)
/ std/io
/ std/str

~ n = 0
* n < 10 {
    ? n == 3 {
        <
    }
    ~ n = n + 1
}
io.print(str.from_int(n))

$ xs = [1, 2, 3]
~ xs[1] = 9
io.print(str.from_int(xs[1]))

$ pure = 'core'
io.print("ok={pure}")

% box {
    ~ v
    $ bump = () {
        ~ .v = .v + 1
        ^ .v
    }
}
$ b = box { v: 10 }
io.print(str.from_int(b.bump()))

$ div = (a, d) {
    ? d == 0 {
        ! 0
    }
    ^ a / d
}
| div(20, 4) {
    $ q {
        io.print(str.from_int(q))
    }
    ! e {
        io.print(str.from_int(e))
    }
}

$ maybe = (x) {
    ? x < 0 {
        ^
    }
    ^ x
}
| maybe(8) {
    $ v {
        io.print(str.from_int(v))
    }
    : {
        io.print(str.from_int(0))
    }
}

io.print(str.from_int(<i32> 10 + <i32> 20))
io.print(str.from_float(<f32> 1.5 + <f32> 2.25))
io.print(str.from_float(3.0 * 2.0))
io.print(str.from_bytes(b'raw'))